class Point {
	double x, y, z;
	public Point(double _x, double _y, double _z) {
		x = _x;
		y = _y;	
		z = _z;
	}
	public double getDistance(Point p) {
		return Math.sqrt((x - p.x) * (x - p.x) + (y - p.y) * (y - p.y)+(z - p.z) * (z - p.z));
	}
}
public class text {	
	public static void main(String[] args) {

	Point p = new Point(3.0, 4.0, 5.0);
	Point origin = new Point(0.0, 0.0, 0.0);
	System.out.println(p.getDistance(origin));
	}

}
